You may have noticed problems during or immediately after the recent IMAP server upgrade. Some unanticipated migration problems occurred that may have caused some lost or delayed mail.
We currently believe that this is limited to mail that arrived between approximately 7am and 10am on Saturday, June 4. If you believe you’ve lost additional mail that arrived either before or after the morning of Saturday, June 4 or if you are still having issues related to the upgrade, please contact idsg@eecs.
We believe that all the problems have now been resolved and sincerely apologize for this inconvenience.